Piston.



F. D. KENNEDY.

PISTON.

APPLICATION F|LEDJUNE30,1914.

1,142,177. PatentedJune 8,1915.

"F1-5. I. i s.. E.

UNITE Pill @FFIQEQ FRANK D. KENNEDY, OF GALESBURG, ILLINOIS.

PISTON.

Specification of Letters Patent.

Application led June 30, 1914. Serial No. 848,298.

To all whom it may concern Be it known that I, FRANK D. KENNEDY, acitizen of the United States, residing at Galesburg, in the county ofKnox, State of Illinois, have invented certain new and usefulImprovements in Pistons; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and vuse thesame. This invention relates to pistons and particularly to that typeprovided with a transverse bore in which is disposed a wrist pin and towhich latter a connecting rod is secured. .f

The object of the inventio'n resides in the provision of an improvedadjustable bushing located 'within the transverse bore of the pistonandsurrounding the wrist pin, the adjustment of said bushing serving totake up wear and thereby prevent lost motion. and when the piston isassociated with an internal combustion engine the adjustment of thebushing referred to serves to prevent knocking in addition to obviatinglost motion.

With the above and other objects in view the invention consists in thedetails of construction and in the arrangement and combination of partsto be hereinafter more fully described and particularly pointed out inthe appended claims.

l In describing the invention in detail reference will be had to theaccompanying drawings wherein like characters of reference denotecorresponding parts in the several views, and in whichy Figure 1 is avertical section through a piston having the invention associatedtherewith; Fig. 2, a section lon the line 2-2 of Fig. 1, and Fig. 3, aperspective view of the adjustable bushing.

Referring to the drawings 10 designates a piston of the type employed ininternal Acombustion engines although it will be understood that theinvention can be associated with various types of pistons irrespectiveof the .particular device in which they are used. The piston 10 isprovided with circumscribing grooves 11 in .which are seatedrespectively the usual packing ring 12. The piston 10 is furtherprovided with a transverse bore 13 which is interrupted centrally by alongitudinal recess 14 formed in the piston to receive one end of aconnecting rod l5.

Disposed in each section of the bore 13 is a bushing A which is formedof a tubular member split longitudinally as at 16 and having acircumscribing flange 17 at one'end bearing against the wall of therecess 14 and preventing outward movement of the bushing A in the bore13.

Rotatably mounted in the bushing A is a wrist pin 18 to which isconnected the connecting rod 15 in the usual and well known manner.

Mounted in the piston 10 and extending longitudinally of the latter areadjusting screws 19 which bear at their inner ends against respectivebushings A..

As the bushings A become worn it will be obvious that such wear can betaken up by operating the screws 19 inwardly against the bushings A tocontract the latter, said contraction being permitted by the split 16.The adjacent edges of the bushings will be drawn closer together andtheir circumferences will be reduced ,without destroying theirlcircularity and without causing any part thereof to be distortedwhereby to frictionally Contact the wrist-pin and prevent the utmostfreedom of movement thereof in the bushing.

What is claimed is l. The combination with a piston provided with atransverse bore and a longitudinal recess interrupting the bore andforming resulting bore sections, a longitudinally split tubular lbushingmounted in each bore section, a circumscribing fiange on the inner endof each bushing and bearing against the adjacent wall of thelongitudinal recess, and means for contracting each bushing. 5

2. In combination, a piston provided with transversely arranged boresections, a split, tubular bushing arranged in each of said sections,the confronting edges of each bushing normally spaced from each other,and one end of each bushing having a circumscribing flange of greatercircumfc; ence tha" the bore and arranged at the inner terminal thereof,a wrist pin encircled by said bushings, and means for bringing the edgesof either bushing into closer relationship and thereby reducing thecircumference of the bushing and bringing it into closer relationship tosaid pin.

Patented J une S, igi.

of either bushing .bushing comprising a 3. In combination, a pistonhaving a transverse bore and a longitudinal recess interrupting it andforming resulting bore sections, longitudinallysplit tubular onshingsarranged one in each bore section and each Ahaving a circumsoribingflange on its inner `end and disposed to lie against the inner end ofthe A`adjacent bore section, a Wrist'pin mounted in, necting rod engagedtherewith, and a plurality of means whereby the circumference may bereduced. L As an article of manufacture, a pistonlongitudinally slittedcylinder having an annular ilange on one of its ends, the slit extendingthrough said flange.

,5. As 'an article of manufacture, a pistonsaid bushings, a conr :ideamabushing comprisingv a longitudinally'7 slitted yielding cylinder havingan annular ange on one ,of its ends, the slit extending through saidflange. f 6, As an article of manufacture, a pistonbushing comprising alongitudinally slitted cylinder having an annular iiange on one of itsends, the slit extending through said flange, the opposed edges of; boththe cylindrical portion and the flange loeingy normally spaced apart butadapted to be brought into juxtaposition.,

1n testimony whereof I afiix my signature in the presence of twoWitnesses..

FRANK D. KENNEDY.

Witnesses;

A. D. Swanson, CLYDE V. lAL'rnRs.

